Notebook Battery

[koffiejunkie <koffiejunkielistlurker@koffiejunkie.za.net>]

Hi guys,

I know the answer to this will probably hurt, but I thought I'd give it 
a shot in any case.  My notebook's battery life took a sudden drop from 
around an hour to about 15 minutes.   I is a 4800mAh battery.  Fully 
charged, I noticed this:

theluggage:/proc/acpi/battery/C17C# cat info state
present:                 yes
design capacity:         329 mAh
last full capacity:      329 mAh   <<--------------------
battery technology:      rechargeable
design voltage:          11100 mV
design capacity warning: 17 mAh
design capacity low:     4 mAh
capacity granularity 1:  100 mAh
capacity granularity 2:  100 mAh
model number:            Primary
serial number:           02034 2005/10/14
battery type:            LIon
OEM info:                Hewlett-Packard
present:                 yes
capacity state:          ok
charging state:          charging
present rate:            1620 mA
remaining capacity:      329 mAh   <<---------------------
present voltage:         12463 mV
theluggage:/proc/acpi/battery/C17C#

Is there anything I can do to improve this, or this battery just on the 
way out?  I'm just bothered by the suddeness of this drop in battery 
life - it's been at about an hour for a good six months now, and stayed 
pretty stable.  Unless some of the cells just died.

Thanks